Welding power source Model WS -160M WS -200M WS-250 Input voltage Frequency VHZ AC 220V±10%50/60HZ AC 3380V±10%50/60HZ Rated output current A 160 200 250 Range of output current A 10160 10200 20250 Zero-load voltage V 42 62 Rated duty cycle % 60 External Size(W×D×H) mm 391×154×287 391×154×287 500×205×360 Weight kg 9 9.5 19 Cooling style Win-cooling